The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 09, 2010
Filed:
Nov. 09, 2004
Christian T. Goralski, Jr., St. Paul, MN (US);
Joseph R. Theis, Rockwood, MI (US);
Gopichandra Surnilla, West Bloomfield, MI (US);
Justin Ura, Livonia, MI (US);
Shane Elwart, Ypsilanti, MI (US);
Christian T. Goralski, Jr., St. Paul, MN (US);
Joseph R. Theis, Rockwood, MI (US);
Gopichandra Surnilla, West Bloomfield, MI (US);
Justin Ura, Livonia, MI (US);
Shane Elwart, Ypsilanti, MI (US);
Ford Global Technologies, LLC, Dearborn, MI (US);
Abstract
A mechanical apparatus including a combustion engine, a conduit for transporting an exhaust stream away from the engine, a first catalytic NOstorage and conversion region disposed along the conduit, and a second catalytic NOstorage and conversion region disposed along the conduit at a location downstream from the first catalytic NOstorage and conversion region is disclosed. Each of the first catalytic NOstorage and conversion region and the second catalytic NOstorage and conversion region includes at least one catalytic metal configured to convert NOto NOwhen the engine is supplied a lean air/fuel mixture, and at least one NOadsorbing compound configured to adsorb NOfor storage when the engine is supplied a lean air/fuel mixture, and wherein the one of the first and the second catalytic NOstorage and conversion regions has a lower concentration of catalytic metal than the other of the first and second catalytic NOstorage and conversion regions.
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